Question

In an interference experiment, the spacing between successive maxima or minima is :

• A. $\frac{\lambda d}{D}$
• B. $\frac{\lambda D}{d}$
• C. $\frac{dD}{\lambda }$
• D. $\frac{\lambda d}{4D}$

Answer 1

The correct option is B $\frac{\lambda D}{d}$

In an interference experiment the spacing between successive maxima and minima is called the fringe width and is given by
$\beta =\frac{D\lambda }{d}$